One hundred twenty-one young adults 18 years of age or older who had been seen at this hospital with juvenile arthritis since 1955 were surveyed by a series of questionnaires to determine current social function and financial status. Chart reviews and patient questionnaires were used to determine modes of onset and the social circumstances of the family at the onset of the arthritis. The patients as a whole were functioning well: 45 were working full time, 25 were in school full time, 23 were in school and working, and 14 were married women at home. Females had a higher prevalence of persisting disability. Patients who had had a polyarticular onset had lower monthly salaries. No other disease or social variables at onset were statistically associated with any of the outcome variables measured. Fifty of the patients were compared to matched siblings and were found to have achieved comparable educations and salaries, and proportionate numbers of marriages and children.